Non-Markovian signatures in the current noise of a charge qubit

TL;DR

This paper explores how memory effects in a charge qubit coupled to a phonon bath influence current noise, revealing the significant role of non-Markovian dynamics in quantum transport.

Contribution

It introduces a novel application of Full Counting Statistics to analyze non-Markovian effects in charge qubit current noise.

Findings

Memory effects significantly alter current fluctuations

Quantum coherence interacts with phonon bath dynamics

Non-Markovian signatures are detectable in noise measurements

Abstract

We investigate the current noise of a charge qubit coupled to a phonon bath in different parameter regimes. We find, using the theory of Full Counting Statistics of non-Markovian systems, that the current fluctuations are strongly influenced by memory effects generated from the interplay between quantum coherence and the dynamics of the phonon bath.